Which framework is associated with web services?

The correct framework associated with web services is ASP.NET. ASP.NET is a robust framework developed by Microsoft that is specifically designed for building web applications and services. It provides a rich set of tools, libraries, and components that facilitate the development of web services, enabling developers to create APIs, consume web services, and implement various protocols (such as SOAP and REST).

ASP.NET supports various architectural designs for web services, making it versatile for different use cases in web development, especially for enterprise-level applications. It also integrates well with various technologies within the Microsoft ecosystem, allowing for seamless interaction between different systems.

In contrast, other options do not serve the primary purpose of creating web services. Node.js is focused on server-side JavaScript for building scalable network applications but is not inherently a framework for web services like ASP.NET. HTML5 is primarily a markup language used to structure content on the web and does not provide functionality for creating web services. CSS is used for styling web pages, enhancing the appearance rather than facilitating service-oriented architecture or APIs.